Just got this great review from flat6bagger, a F6B rider on another board, and wanted to share it. Thanks for those that have tried our product.
The Folks at F4 Customs

I have a F4 windshield on my F6B.
It has been on for two riding seasons.
It has taken hits from rocks,road debris and even a bird.
Other than one tiny nick it is still in great shape.
I am very pleased with this windshield and will buy another when this one needs replaced.
Thanks F4 Customs for producing a great windshield.